I saw several of these at Harford Glen park on July 29th, 2012.

This female was near the picnic area pond at Susquehanna State Park on August 11th, 2012.

This one was at Swan Harbor on August 17th, 2012.

I saw these at Kenilworth Aquatic Gardens in Washington, DC, on August 18th, 2012.

This female was at Susquehanna State Park on June 23rd, 2013.

These were near the same pond on July 3rd, 2013.

I saw this one at Swan Harbor that same day.

I saw this one at Swan Harbor that same day.

This one was near the WB&A trail near Washington DC on July 29th, 2013.

These were at Swan Harbor on August 16th, 2013.

I saw this one at Swan Harbor on June 28th, 2014.

This female was there on July 20th, 2014.

I saw this one at Swan Harbor on August 3rd, 2014.

I saw this one there on June 13th, 2015.

This one was at Kenilworth Aquatic Gardens in DC on July 10th, 2015.

These were at the Patuxent Research Center on July 10th, 2015.

I saw this one at Santee NWR, SC on August 2017.